Removing duplicated remarks

[wendellpiez]

Committer Notes

In some cases (definitions expressed in line) remarks were being emitted to display twice, due to incorrect XSLT logic.

As corrected, if an instance is defined globally, it should have both its definition's remarks followed by its own remarks, if any. When defined in line (or when used at the top) its remarks are also shown.

All Submissions:

• Have you followed the guidelines in our Contributing document?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• Have you squashed any non-relevant commits and commit messages? [instructions]
• Do all automated CI/CD checks pass?

Changes to Core Features:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your core changes, as applicable?
• Have you included examples of how to use your new feature(s)?
• Have you updated all website](https://pages.nist.gov/metaschema) and readme documentation affected by the changes you made? Changes to the website can be made in the website/content directory of your branch.

[david-waltermire]

LGTM. Thanks!